Charges



1,627,672 c. o. SNYDER SOUND AMPLIFIER FOR RADIO TRANSMISSION May 10, "1927.

Filed June 19, 1922 jvwewtozi J Mar/ 25 0.

affmucq Patented May 10, 19279 umr sr CHARLES 0. SNYDER, OF RICHMOND, INDIANA.

ramp

sine

S OITNI D AMPLIFIER FOR RADIOTRANSMISS ION.

- Applicationfiled June 19,

I highly eflicient in practice, positive in ac tion, easily operated and controlled, and which can be manufactured and sold at a comparatively low price. ,7

More specifically stated my object is to 19 provide a sound transmitter or reflector, by

the employment of which. the usual telephone set used on ones head in radio production may be applied in such manner that all persons in aroom, or in proximity thereto, may distinctly hear the sounds from the radio apparatus without a telephone set being attached to ones person, and whereby one telephone set will answer for a greatnumber of people.

The preferred means for'carrying out the principles of my invention in a practical manner is sh own in the accompanying drawing, in which- Figure 1 is a view looking downward, showing one portion of the device in central horizontal section, and. showing a plan view of the other portions of the construction. Figure 2 is a front elevation of the device. Figure 3 is a central cross section of the device, and Figure 1 is a plan view showing a slightmodification of the arrangementof the conductor.

Similar indices denote like parts throughout the several views.

In order that the construction, the arrange ment, the operation, and the advantages of the invention maybe more fully understood and appreciated, I will now take up a detailed description thereof, in which I will set forth the same as fully as I may.

Referring now to the drawings in detail: The maj or portion of the construction comprises the relatively large concave (or concave-convex) reflector or forwardly flaring body 1, preferably elliptical in shape, that is its horizontal diameter is greater than is its vertical diameter.

Connected with the exterior of the lower side of the reflector or body 1 are the two spaced apart brackets 2 and 3, which pro the device to rest securely upon a table A, or other surface, and by which the reflector will be supported in its most effective opera- 1 vide feet, to afford means for permitting;

1922. Serial No. 569,408.

ing, as shown, and whose forward portion merges into one or more branches, as for instance the branches 5 and 6, thereby formin ra conduit, as indicated in Fig. 3, through which sound waves may pass unobstructed.

Extending out from lower portion of the conductor tare the ears 7and 8, which are adapted to contact with the lower wall of the inner face of the reflector, to which they are adapted to be secured by means of screws or bolts 9. The under portion of the conductor 4: is .cut away on a line even with the lower edge of the reflector 1 to the.

innerend of the conductor 4, whereby the .wall or face of the reflector forms the bot tom wall of the i Fig. 3.

this arrangement all or part of the flaring portion of the conductor is located inside the reflector, while the branches 5 and 6 are usually outside the reflector, all substantially as shown in Fig. 1.

Extending around and integral with the branches 5 and 6 are the respective collars conductor, as indicated in 10 and 11, thereby forming the end portions of the branches into the respective nipples 12 and 18.

Numerals 14 and 15 denote cushions, each being in the nature of a collar, preferably of rubber, which fit around the respective nipples '12 and 13, and extending slightly therebeyond, with their inner ends in contact with the respective collars 10 and 11, which prevent them slipping inward beyond the distance desired.

Letters B anl 0 denote two receivers of a telephone set, each being provided with its two electricwires DD and E E, respectively, through which electric circuits may be established.

Pivoted to said receivers are the respective stems F and G, and slidably connect ing said stems is the spring; head-band H.

In the usual practice the band H is placed over the top of ones head, while the spring resiliency of said band causes the faces of the receivers B and C to be pressed firmly against ones ears, whereby a single person only hears the sounds produced in the receivers. However when using; my invention the receivers are sprung apart and then their faces are brought into contact with the outer ends of the cushions 14 and 15, where they will be retained by the contraction of the spring head-band, the same as they may be retained in contact with ones ears. And it is to be understood that transmitters may be likewise used when desired.

In the construction just described, pertaining more particularly to Figs. 1 and 2, the receivers B and C, or transmitters. will be retained in operative position as shown simply by the tension of the spring head band H, as the pressure of one will counterbalance the other. However where the branches 5 and 6 do not extend directly opposite to each other but are disposed at angles with relation to each other, as shown in Fig. l, then additional means must be provided to retain the receivers on their cushions. This may be accomplished by means oi the rubber bands I and J. or other means or devices may be provided. When in place said bands are under tension and atl'ord a ready and effective retaining means.

It will now be seen that with the receivers attached, as shown, that the sounds developed in the receivers 13 and C will pass through the branches 5 and 6 into the conductor 4, and then to one side of the central portion of the interior of the reflector, from which latter the sound waves will be deflected in such way that any one within a broad radius may hear distinctly.

I desire that it be understood that various changes may be made in the several details of construction herein shown without departing; from the spirit of the invention and Without sacrificing any of the advantages thereof which are new and useful.

Having now fully shown and described my invention what 1 claim and desire to secure by Letters Patent of the United States, 1s-

A sound amplifier for radio transmission comprising in combination, a concave rellector forming the body of the device, a tubular conductor located inside the reflector with one end of the conductor directed inward toward the vortex of the reflector, the inner portion of the conductor being formed flaring, and the lower portion of the conductor being cut away and forming a bottom therefor, all substantially as set forth.

CHARLES O. SNYDER. 

